الفهرس 
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Abstract
The present study to: l) determine the effect of hormonal treatment on hatchability. (2) Compare the genetic sex ratio of the treated chicks with that dermined by vent sexing at hatching time. (3) determine the effect of harmonal treatment on the post-natal body weight and mortality. (4) determine the effect of injecting Dokke fertile eggs with female sex harmone at the fourth day of incubation n the development of the reproductive organd and the secondary sex characteristics of chicks at different ages from hatching to 28 weeks of age.